Acacia lullfitziorum

The spreading spinose shrub typically grows to a height of 0.2 to 0.7 metres (0.7 to 2.3 ft) and a width of 0.4 to 1.3 metres (1.3 to 4.3 ft).^[1] It generally has a prostrate or diffuse habit and will often form low-domed shaped mats. It has glabrous or shortly haired branches that divide into multiple, short, and spinose branchlets that have scarious stipules with a length of 1 to 2.5 mm (0.039 to 0.098 in). Like most species of Acacia it has phyllodes rather than true leaves. The thin and glabrous phyllodes have an oblong to elliptic or ovate shape with a length of 5 to 13 mm (0.20 to 0.51 in) and a width of 2 to 4 mm (0.079 to 0.157 in) and have a non-prominent midrib.^[2] It blooms from August to October and produces yellow flowers.^[1]

The species was first formally described by the botanist Bruce Maslin in 1999 as part of the work Acacia miscellany. The taxonomy of fifty-five species of Acacia, primarily Western Australian, in section Phyllodineae (Leguminosae: Mimosoideae) as published in the journal Nuytsia. It was reclassified as Racosperma lullfitziorum by Leslie Pedley in 2003 then transferred back to genus Acacia in 2006.^[3]